One Response to “screwage”

I figured the meaning being hinted at was more the screw from “screw over”, meaning to rip someone off, cheat them, or otherwise behave immorally especially in a business-type interaction. Since corkage fees are often thought of as the restaurant screwing over customers:

“Shall we bring a bottle?”
“Not worth it, they’ll screw you on the corkage fees”

Makes me wish that “corking” was a fitting verb so that “They’ll cork you on the screwage fees” made any kind of sense.